[AUDIT] collect uid, loginuid, and comm in OBJ_PID records

Add uid, loginuid, and comm collection to OBJ_PID records.  This just
gives users a little more information about the task that received a
signal.  pid is rather meaningless after the fact, and even though comm
isn't great we can't collect exe reasonably on this code path for
performance reasons.

Signed-off-by: Eric Paris <eparis@redhat.com>

diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ce8c957..a222e73 100644 (file)
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -176,7 +176,10 @@ struct audit_aux_data_fd_pair {
 struct audit_aux_data_pids {
        struct audit_aux_data   d;
        pid_t                   target_pid[AUDIT_AUX_PIDS];
+       uid_t                   target_auid[AUDIT_AUX_PIDS];
+       uid_t                   target_uid[AUDIT_AUX_PIDS];
        u32                     target_sid[AUDIT_AUX_PIDS];
+       char                    target_comm[AUDIT_AUX_PIDS][TASK_COMM_LEN];
        int                     pid_count;
 };
 
@@ -214,7 +217,10 @@ struct audit_context {
        int                 arch;
 
        pid_t               target_pid;
+       uid_t               target_auid;
+       uid_t               target_uid;
        u32                 target_sid;
+       char                target_comm[TASK_COMM_LEN];
 
        struct audit_tree_refs *trees, *first_trees;
        int tree_count;
@@ -930,7 +936,7 @@ static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
 }
 
 static int audit_log_pid_context(struct audit_context *context, pid_t pid,
-                                u32 sid)
+                                uid_t auid, uid_t uid, u32 sid, char *comm)
 {
        struct audit_buffer *ab;
        char *s = NULL;
@@ -941,11 +947,14 @@ static int audit_log_pid_context(struct audit_context *context, pid_t pid,
        if (!ab)
                return 1;
 
+       audit_log_format(ab, "opid=%d oauid=%d ouid=%d", pid, auid, uid);
        if (selinux_sid_to_string(sid, &s, &len)) {
-               audit_log_format(ab, "opid=%d obj=(none)", pid);
+               audit_log_format(ab, " obj=(none)");
                rc = 1;
        } else
-               audit_log_format(ab, "opid=%d  obj=%s", pid, s);
+               audit_log_format(ab, " obj=%s", s);
+       audit_log_format(ab, " ocomm=");
+       audit_log_untrustedstring(ab, comm);
        audit_log_end(ab);
        kfree(s);
 
@@ -1176,13 +1185,17 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 
                for (i = 0; i < axs->pid_count; i++)
                        if (audit_log_pid_context(context, axs->target_pid[i],
-                                                 axs->target_sid[i]))
+                                                 axs->target_auid[i],
+                                                 axs->target_uid[i],
+                                                 axs->target_sid[i],
+                                                 axs->target_comm[i]))
                                call_panic = 1;
        }
 
        if (context->target_pid &&
            audit_log_pid_context(context, context->target_pid,
-                                 context->target_sid))
+                                 context->target_auid, context->target_uid,
+                                 context->target_sid, context->target_comm))
                        call_panic = 1;
 
        if (context->pwd && context->pwdmnt) {
@@ -2185,7 +2198,10 @@ void __audit_ptrace(struct task_struct *t)
        struct audit_context *context = current->audit_context;
 
        context->target_pid = t->pid;
+       context->target_auid = audit_get_loginuid(t);
+       context->target_uid = t->uid;
        selinux_get_task_sid(t, &context->target_sid);
+       memcpy(context->target_comm, t->comm, TASK_COMM_LEN);
 }
 
 /**
@@ -2222,7 +2238,10 @@ int __audit_signal_info(int sig, struct task_struct *t)
         * in audit_context */
        if (!ctx->target_pid) {
                ctx->target_pid = t->tgid;
+               ctx->target_auid = audit_get_loginuid(t);
+               ctx->target_uid = t->uid;
                selinux_get_task_sid(t, &ctx->target_sid);
+               memcpy(ctx->target_comm, t->comm, TASK_COMM_LEN);
                return 0;
        }
 
@@ -2239,7 +2258,10 @@ int __audit_signal_info(int sig, struct task_struct *t)
        BUG_ON(axp->pid_count >= AUDIT_AUX_PIDS);
 
        axp->target_pid[axp->pid_count] = t->tgid;
+       axp->target_auid[axp->pid_count] = audit_get_loginuid(t);
+       axp->target_uid[axp->pid_count] = t->uid;
        selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]);
+       memcpy(axp->target_comm[axp->pid_count], t->comm, TASK_COMM_LEN);
        axp->pid_count++;
 
        return 0;